Chifukwa chiyani mapaipi achitsulo ayenera kutenthedwa?

Ntchito ya kutentha mankhwala ndi kusintha zinthu mawotchi zimatha zitsulo chitoliro, kuthetsa nkhawa yotsalira ndi kusintha ntchito yake kudula.

Malinga ndi zolinga zosiyanasiyana za chithandizo cha kutentha, njira yochizira kutentha ingagawidwe m'magulu awiri: chithandizo choyambirira cha kutentha ndi chithandizo cha kutentha komaliza.

1. Chithandizo choyambirira cha kutentha

Cholinga cha chithandizo choyambirira cha kutentha ndikuwongolera machinability, kuthetsa kupsinjika kwamkati ndikukonzekera dongosolo labwino la metallographic pomaliza chithandizo cha kutentha. Njira zake zochizira kutentha kumaphatikizapo annealing, normalizing, kukalamba, kuzimitsa ndi kutentha, etc.

(1) Kuwotcha ndi Normalizing

Annealing ndi normalizing amagwiritsidwa ntchito popanga malo osagwira ntchito otentha. Pazitsulo za carbon ndi alloy zitsulo zokhala ndi mpweya wochuluka kuposa 0.5%, chithandizo cha annealing nthawi zambiri chimagwiritsidwa ntchito kuchepetsa kuuma kwake komanso kudula kosavuta; Kwa zitsulo za carbon ndi alloy zitsulo zokhala ndi mpweya wosakwana 0.5%, mankhwala ochiritsira amatengedwa pofuna kupewa kumamatira chida panthawi yodula. Nthawi zambiri amakonzedwa pambuyo popanga zinthu zopanda kanthu komanso asanapange makina ovuta.

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(2) Chithandizo cha ukalamba

Chithandizo cha ukalamba chimagwiritsidwa ntchito kwambiri kuti athetse kupsinjika kwamkati komwe kumapangidwa popanga zinthu zopanda kanthu komanso kupanga makina.

Pofuna kupewa kuchulukirachulukira kwa ntchito zoyendera, mbali zolondola kwambiri, chithandizo cha ukalamba chimatha kukonzedwa musanamalize. Komabe, kwa magawo omwe ali ndi zofunikira zolondola kwambiri, njira ziwiri kapena zingapo zochiritsira zokalamba ziyenera kukonzedwa. Thandizo la ukalamba silifunikira pazigawo zosavuta.

(3) Kusintha

Kuzimitsa ndi kutentha kumatanthawuza chithandizo cha kutentha kwambiri pambuyo pozimitsa. Itha kupeza mawonekedwe a sorbite ofananirako komanso owoneka bwino ndikukonzekera kuchepetsa kupunduka panthawi yozimitsa pamwamba ndi chithandizo cha nitriding mtsogolo. Chifukwa chake, kuzimitsa ndi kutentha kungagwiritsidwenso ntchito ngati chithandizo choyambirira cha kutentha.

2. Chithandizo chomaliza cha kutentha

Cholinga cha chithandizo chomaliza cha kutentha ndikuwongolera zinthu zamakina monga kuuma, kukana kuvala ndi mphamvu.

(1)Kuzimitsa

Kuzimitsa kumaphatikizapo kuzimitsa pamwamba ndi kuzimitsa kofunikira. Pakati pawo, kuzimitsa pamwamba kumagwiritsidwa ntchito kwambiri chifukwa cha kapindika kakang'ono, oxidation ndi decarburization. Kuphatikiza apo, kuzimitsa pamwamba kumakhalanso ndi zabwino zamphamvu zakunja zakunja, kukana kwabwino kovala, kulimba kwamkati komanso kukana mwamphamvu.

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(2) Kuzimitsa moto

Carburizing ndi kuzimitsa zimagwira ntchito ku low carbon steel ndi low alloy steel. Choyamba, onjezani zomwe zili ndi kaboni pamwamba pa zigawozo, ndikupeza kuuma kwakukulu mukatha kuzimitsa, pomwe pachimake chimakhalabe ndi mphamvu zina komanso kulimba kwambiri komanso pulasitiki.

(3) Chithandizo cha Nitriding

Nitriding ndi njira yochizira kuti maatomu a nayitrogeni alowe pamwamba pazitsulo kuti apeze zinthu zosanjikiza zomwe zimakhala ndi nayitrogeni. Nitriding wosanjikiza amatha kusintha kuuma, kukana kuvala, mphamvu ya kutopa komanso kukana dzimbiri kwa magawo. Popeza kutentha kwa nitriding kumakhala kochepa, mapindikidwe ake ndi ang'onoang'ono, ndipo nitriding wosanjikiza ndi woonda (nthawi zambiri osapitirira 0.6 ~ 0.7mm), ndondomeko ya nitriding iyenera kukonzedwa mochedwa kwambiri. Pofuna kuchepetsa mapindikidwe panthawi ya nitriding, kutentha kwambiri kuti muchepetse kupsinjika kumafunika mukatha kudula.


Nthawi yotumiza: Mar-04-2022
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